package com.hippoDocker.uaa.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * @ClassName FastJsonRedisSerializer
 * @Description TODO 序列化器：Redis序列化采用FastJson序列化  属性或方法上加入@JSONField(serialize = false)//不进行序列化到redis中
 * @Author tangxl
 * @Date 2022/7/28 15:45
 **/
public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {

    /**
     * 默认字符编码
     */
    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    private Class<T> clazz;

    static {
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
    }

    public FastJsonRedisSerializer(Class<T> clazz){
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException {
        if (t == null) {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if (bytes == null || bytes.length <= 0) {
            return null;
        }
        String str = new String(bytes, DEFAULT_CHARSET);

        return JSON.parseObject(str, clazz);
    }

    protected JavaType getJavaType(Class<?> clazz){
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}
